Record confirmation apparatus

Details Record confirmation apparatus Record confirmation apparatus

1985-01-07

1988-04-26

Cardillo, Raymond F.

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369 54, 369 58, 360 53, G11B 2018, G11B 714, G11B 2736, G11B 1914

Patent

active

047409428

ABSTRACT:
A record confirmation apparatus comprises a recording device for recording information on a disc-like record bearing member rotated at a predetermined angular speed, in accordance with a writing signal, a reproducing device disposed at a predetermined distance from the recording device in the tangential direction of the record bearing member for reproducing the recorded information as a read-out signal, and a comparing device for delaying the writing signal and comparing it with the read-out signal, the comparing device having a variable delay circuit for varying the delay time in conformity with the relative position of the recording device and the reproducing device relative to the record bearing member in the radial direction of the record bearing member.

REFERENCES:
patent: 2774056 (1956-12-01), Stafford et al.
patent: 3805284 (1974-04-01), Coon, Jr. et al.
patent: 4225873 (1980-09-01), Winslow
patent: 4375091 (1983-02-01), Dakin et al.
patent: 4488277 (1984-12-01), McFarlane et al.
patent: 4578721 (1986-03-01), Brannan, Jr.
patent: 4602301 (1986-07-01), Saito et al.

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